I was also thinking about that- why Lizzy, how did he grab her, what set him off...
Maybe- just my opinion, not a fact- she got up from her room to go to the toilet or something, and he was still (as he said in the affidavit) there, finishing his beer. Maybe he saw the opportunity then.
Also, it would be much easier to grab her there than to grab her asleep in her bedroom- she would probably wake up and scream, thus waking the infant up and their parents would have heard and intervened.
I think AW is always angry. I think he likes feeling angry because at least he feels "something" when he's angry. If he wasn't angry he'd just be depressed and depression is unbearable... anger is a better feeling for him, imo. In retrospect, I think he enjoys when something happens to cause him to become full of rage because then his impulse takes over and he gets relief from locating an
immediate target and venting physically until his rage subsides back into "just angry as usual again."
When first arrested, he was hardly communicating with LE. But, one subject he brought up was that his sister and her boyfriend were "fooling around" sexually.
He brought it up during his "oh, poor me childhood stuff" ....so it's very significant, imo.
His sister, her boyfriend, AW and a video game (along with at least beer and rum) were apparently enjoying a party of 3 and suddenly 2 in the group created a party of 2 with the 3d wheel supposedly "looking like he'd pass out" left out on the couch alone.
Odd man out... bedroom door closed "in his face"... left out once again, as usual. "Bye... you're not invited and we've left you behind... change in plans! We don't want you. Reject." It's a different version from childhood but any version will do that triggers him. He gets closed out and left behind, again... that's a big cause and reaction for him, imo. It wouldn't be like that for most people. That's how he sees it through his own set of "persecution complex glasses" he wears on a chain around his neck.
Did he walk over to the bedroom door and quietly listen to what was going on behind the closed door? I think he might have. He may have been wrong, too, but he thinks he was right or so he told LE. We can't know. But, the real problem was that Lizzy was right there outside the bedroom door. If he was building up to a rage over real or imagined rejection... there she was between the true objects of his rage and himself.
Note the timing: He said
that's when he left the house because he said he didn't want to hear them making love. I believe he told the truth there. His sister and boyfriend making love caused him to leave the house at that time. Conveniently missing is that he took Lizzy with him. (lie by omission)
So, now his temper is set to explode and he needs something to beat up or throw or destroy. Lizzy was sleeping outside his sister's door and the knife was in the kitchen and the PVC pipe might be kept in the house as protection for the sister and boyfriend. Attacking Lizzy was so much easier than confronting and attacking 2 adults.
There's no higher level of thought involved, imo. He goes from anger to a rage and impulse takes over.
No more complicated than you or I getting stung and, before we think, we reach out and slap or brush at the area where we feel the bite. I think it's a chronic reaction for him and the fuse was getting shorter and shorter the older he became and this makes him extremely dangerous.
I used to know a man who went from anger~ to rage~ to attack~ to resultant relief and calm~ just that quickly and habitually. I noticed that ,
so very often, the target was not the actual cause of the rage and was almost always an inappropriate choice. But, the true target was always someone who was a greater challenge, stronger, more physically and
emotionally threatening to the attacker. The chosen target was always just there, and "handy and easy to destroy."
Imo, AW simply "killed three birds with stone by hurting them all" that night and he felt good for a very short while. And now he's got the rest of his life to feel sorry for himself... and he will do that every day.
My whole comment is opinion.